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1. ### What minimum speed does a 170 g puck need to make it to the top of a 4.20 m -long, 25.0 ∘ friction less ramp?

... the mass is on each side and cancels out. The speed is the same for a puck or a railroad engine.

3 Answers · Science & Mathematics · 11/12/2018

2. ### How fast would a golf ball fall if dropped from an airplane? In MPH. How long to reach that speed?

...10^-3*10^3*10 V = √ 21.4*16/3*10 ≅ 34 m/sec = 76 MPH the time needed for reaching that speed is nearly 3 times the time taken in vacuum , i.e. 3*34/10...

3 Answers · Science & Mathematics · 29/11/2019

3. ### Hi guys, i need a bit of help with an physics assigment ( can't solve it and my brother needs it for tomorrow)?

f’ = observed frequency f = source frequency v = speed of sound vₛ = source’s speed= 72 km/h = 20m/s v₀ = observer’s speed = 32km...

3 Answers · Science & Mathematics · 17/09/2019

4. ### Consider an elevator car (lift) with a mass of 700kg which call carry up to 600kg of passengers. Use g = 10ms^-2.?

The speed is not needed for the total energy required if any gain in kinetic energy at the beginning is used in permitting the elevator to coast to a stop. E = mgh = ( 700+600)*10 * 9 = 117 kJ approximately.

2 Answers · Science & Mathematics · 15/08/2019

5. ### I need Physics help with speed I will give the best answer!?

... v = 15.3 m/s t = 7.10 s and arrange the equation for the unknown u: 0.5*(u+v)*t = s (u + v)t = 2s (u + v) = (2s)/t u... in the question.) Therefore the antelope's initial speed was 4.14 m/s to 3sf.

1 Answers · Science & Mathematics · 28/01/2019

6. ### The drawing shows a graph of two waves traveling to the right at the same speed. (a) Using the data in the drawing....?

...motion and we can use the standard formula: max. speed = ω * amplitude We don’t need the wave speed (14m/s) as we told frequency and ω = 2πf. Hence: max. speed = 2πf * amplitude For wave A, max. particle speed = 2π(7) * 0.50 = 22.0m/s For wave B...

1 Answers · Science & Mathematics · 01/05/2019

7. ### A baseball player rounds second base in an arc with a radius of curvature of 6.52m at a speed of 6.8m/s. Please Help!?

Since the baseball player is moving at a constant speed, the friction force is equal to the centripetal force. To solve this problem, I will need to determine the exact number for the centripetal force. This is good way to check your answer. ...

3 Answers · Science & Mathematics · 02/02/2019

8. ### Exercise physics need help?

... be reachable by the bullet. Let's say the bullet is in the air for time "t." If the bullet is just able to reach the car, impact...

2 Answers · Science & Mathematics · 10/07/2019

9. ### Help with physics?

...definitely spin a rock at 10% faster speed without needing a longer rope. Maybe we are...39;ve been stated in the question. For speed Fcp = mv^2 / r If you want that to...

1 Answers · Science & Mathematics · 11/02/2019

10. ### Physics help?

...) is maximum (max value = ωA when x=0). ω is a constant so for half max. speed we need √(A² - x²) = A/2 A² - x² = A²/4 ...

2 Answers · Science & Mathematics · 27/02/2019